Gender statistics are needed to measure and monitor the realities of the lives of women and men, and of girls and boys. A broad diversity of topics and issues is covered under the heading of gender statistics, reflecting the changing roles of women and men in society, in the economy and in families and households. Gender statistics help policy makers to formulate and monitor policies and plans, monitor changes, and inform the public. UNWomen, a UN organization dedicated to gender issues particularly women, works with UNECE member states to improve the monitoring of gender equality in all its many dimensions across regions and countries, by facilitating the exchange of best practices and the development of guidelines and recommendations on the collection, production and dissemination of gender-relevant indicators. Their work in this area is guided by the Gender Steering Group which, among other activities, holds Work Sessions on Gender Statistics approximately every 18 months. These work sessions provide a regular forum for member states, international organizations working in statistics, and others, to share and develop ideas concerning concepts, methodology, progress and emerging issues in gender statistics. UNWomen, a UN organization dedicated to gender issues particularly women, works with UNECE member states to improve the monitoring of gender equality in all its many dimensions across regions and countries, by facilitating the exchange of best practices and the development of guidelines and recommendations on the collection, production and dissemination of gender-relevant indicators. Their work in this area is guided by the Gender Steering Group which, among other activities, holds Work Sessions on Gender Statistics approximately every 18 months. These work sessions provide a regular forum for member states, international organizations working in statistics, and others, to share and develop ideas concerning concepts, methodology, progress and emerging issues in gender statistics. The Zanzibar Constitution of 1984 declares equal rights of men and women, and equal access to social, economic and development opportunities. Zanzibar which is a part of the URT has dedicated to implement and monitor national and international conventions including MKUZAIII, the Sustainable Development Goals (SDGs) the Declaration of the Human Rights 1948; the UN Convention on the Elimination of All Forms of Discrimination Against Women (CEDAW 1979); the Convention on the Rights of the Child (CRC) 1989 and the Convention on the Elimination of Discrimination in Employment. Successful implementation of global, regional and national development agendas while observing gender disparity and differentiation, regular monitoring and evaluation is inevitable. Statistics is a key tool for monitoring and evaluation. Gender statistics has now become among the global agenda by itself and as it is well known that gender is a cross cutting issue in all socio-economic perspectives. This put gender statistics in a position of among important items to be taken care of by the OCGS.